摘要 |
A portable optical magnifying device ( 1 ), for observing specimens within a specimen-vessel having a transparent flat wall, comprises an eyepiece ( 4 ) and an objective ( 3 ), a light-path being defined therebetween. The device ( 1 ) includes a spacer ( 7 ) arranged at least partly around the objective ( 3 ) and which is adapted in use to seat the device ( 1 ) against the flat wall of the specimen vessel with the objective ( 3 ) closely adjacent but spaced therefrom, and with its optical axis normal thereto. The device ( 1 ) further includes means ( 9 ) for releasably attaching the device ( 1 ) to the flat wall, with the space ( 7 ) bearing against the flat wall of the specimen vessel. Attachment is achieved by evacuation of the space between objective lens, spacer and flat wall.
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